Alive Quote by David M. Raup

Of the many species that have existed on earth - estimates run as high as fifty billion - more than ninety-nine per cent have…

— Elizabeth Kolbert

“Of the many species that have existed on earth--estimates run as high as fifty billion--more than ninety-nine per cent have disappeared. In the light…

— Elizabeth Kolbert

Ninety-nine percent of all species that ever lived are now extinct.

— E. O. Wilson

Most people are surprised when they hear my somber figures: we know of 2 million species of plants, animals and microorganisms, and we can…

— E. O. Wilson

There are about 250,000 different species of fossil plants and animals known . . In spite of this large quantity of information, it is…

— David M. Raup

For millions of years, on average, one species became extinct every century… We are now heaving more than a thousand different species of animals…

— Douglas Adams

Take the crocodile, for example, my favorite animal. There are 23 species. Seventeen of those species are rare or endangered. They're on the way…

— Steve Irwin

99.99 percent of all species that have ever lived are no longer with us.

— Bill Bryson

Very few species have survived unchanged. There's one called lingula, which is a little shellfish, a little brachiopod about the size of my fingernail,…

— David Attenborough

Nature is not here to keep you alive. It has just as many ways to kill you as it does to sustain you. And…

— Neil deGrasse Tyson

What is your personal carrying capacity for grief, rage, despair? We are living in a period of mass extinction. The numbers stand at 200…

— Lierre Keith

“Any environmental biologist or statistician will tell you that humankind’s best chance of long-term survival occurs with a global population of around four billion.”

— Dan Brown